LOCAL ANAESTHETIC DRUGS classification Mnemonics|| Best ever classification tricks || made simple

Drugs used as Local anaesthetics:
Short-acting & Low potency:
Procaine: It is an ester anaesthetic agent used for the production of local anaesthesia, particularly for oral surgery.
Intermediate-acting & Intermediate potency:
Lidocaine: It is the most widely used agent. It acts more rapidly and is more stable than most other local anaesthetics. Its action lasts about 90 mins when given epinephrine.
Prilocaine: It is most likely to produce vasoconstriction at clinical doses. It has a similar action to lidocaine but is extensively metabolized and less toxic in equipotent dose.
Mepivacaine: It is an amide local anaesthetic and chemically related to bupivacaine.
Cocaine:
• It is an alkaloidal ester extracted from the coca leaves. It produces anaesthesia by inhibiting the excitation of nerve endings or by blocking conduction in peripheral nerves.
Benzocaine: It is a neutral, water-insoluble, local anaesthetic of low potency. Its only use is in surface anaesthesia for non-inflamed tissue such as the mouth and pharynx.
Long-acting & high potency:
a. Tetracaine: It is an ester-type anaesthetic and produces local anaesthesia by blocking the sodium ion channels involved in the initiation and conduction of neuronal impulses.
b. Bupivacaine: It is potent and has a long duration of action (up to 8 hrs). It produces more sensory than a motor blockade, hence very popular for obstetric analgesia.
c. Cinchocaine: It is one of the most potent and toxic of the long-acting local anaesthetics.